Stereoscopic motion-picture camera



June 29 1926. 1,590,804

c. BOUIN STEREOSCOPIC MOTION PICTURE CAMERA Filed n 10, 1922 4 Sheets-Sheet 1 June 29. 1926.

'4 Sheets-Sheet 2 C. BOUIN STEREOSCOPIC MOTION PICTURE CAMERA Filed June 10 1922 June 29 1926.

C. BOUIN STEREOSCOPIC MOTION PICTURE CAMERA Filed June 10 1922 5} Sheets-Sheet 5 H IIIIIHHII June 29 l 926. 1,590,804

C. BOUIN STEREOSGOPIC MOTION PICTURE CAMERA Filed June 10, 1922 4 Sheets-Sheet 4 WVWTUR:

Patented June 29, 1926.

UNITED STATES CHARLES BOUIN, OF BOSTON, MASSACHUSETTS.

STEREOSGOPIC MOTION-PICTURE CAMERA.

Application filed lfune 10, 1922. Serial No. 567,455.

This invention relates to the production of stereoscopic motion pictures upon standard size film, and more particularly to a stereoscopic motion picture camera employing standard size film.

Some of the objects and advantages-of the stereoscopic motion picture camera of this invention may be mentioned as follows To register upon a standard size film stereoscopic images of scenes or objects or right and left pairs of images which are of the standard size of one inch by inch each and with such images in true horizontal alinement in relation to each other, and the right and left pairs of images being equal to stereoscopic distances from each other on the film. Such images or stereoscopic pairs run in a horizontal direction of length of film. The distance of the two lenses (right and left) equalling 2 inches, or between the two openings in film gate, there being a distance which is equal to two widths of images or 1% inches, or any equal %umher of image widths, as indicated in ig. 9.

Referring to the accompanying drawings:

Fig. 1 is a horizontal section showing most all gears on left side of camera.

Fig. Q is a vertical. section on line 22.

of Fig. 1, showing position of gears attached to left wall camera.

Fig. 3 is a horizontal section, showing a modification of the position of the gears at lower bottom part of camera.

at is a rear elevation of the same, the casing being in section, showing a back View of gears at bottom part of camera and shutter in front.

Figs 5, 6, '4", 8, show different styles of shutters which may he used in either of thestyles of camera mentioned, according to the resu ts desired.

Fig. 9', show the openings in the film gate for standard size film. The size of openings in film gate corresponding to the size of images photographed upon film,

Fig. 10 is a cross-sectional plan View, showing position of shutter, or color screen when such is employed,

In Fig. l, which represents a cross-see tional plan View, 1 and 1 represent a pair of stereoscopic lenses which are in a true horizontal a inemenato correspond to positions images film, as in Fig, 9, ac

cording. to the portion of film which the right and left views are intended to occupy.

The shaft upon which gears 2 and 2 rest runs in a horizontal direction and in the same direction of length of film, the shaft being higher than position of left or right lens as indicated in Fig. 2 in order not to interrupt the path through which the light rays travel from lens 1' to film at 20 in Fig. 1, 2 and 2 being so geared to gears 11 and 3 to revolve shutter 16 eight times per each turn of camera handle or to each revolution of gear 11; 4: represents the sprocket wheel which pulls film thru film aperture. This sprocket wheel and shaft upon which it rests being in a vertical direction, and meshmg gears l to 4:, 12 to 12'; upon the same shaft of 12 is the master gear 11 and also the Maltese cross part of the intermittent motion. With such a combination, one revolution of master ear 11 will cause sprocket wheel 4 to pull film through film aperture eight image widths in distance, to be further explained. It is to be noticed that sprocket wheel pulling film through film aperture is not on the same shaft of either of the two parts of the two Maltese cross parts. 5, represents the moving picture film; 9, represents the balance or fiy wheel, being revolved by means of meshing of gears 15 and llg-lO, represents film gate; master gear 11 meshing with 14' gear revolving the intermittent motion it and 13; master l1 meshing with 17 revolving gears l8, l9, and sprocket wheel 6.

In Figs. 1 and 2 the gears 2'", ll, 1%, 12, 13,14, 14, 15, 17, and balance wheel 9, are all placed on left side of camera and enclosed in a partition.

Fig. 3 represents a cross-sectional plan view of another style stereoscopic camera, having the majority of gears at the lower partition of camera, otherwise the general principle being the same as in Figs. 1 and 2. In both styles of cameras, Figs. 1 and 8, the sprocket wheel which pulls the through film gate is not on the same shaft upon which the two parts of the Maltese cross intermittent gear rests.

In Fig. 5, the shutter has an opening 1 which is equal to 4 the circumference of shutter and is intended to be employed when left and right exposures are made at differ ill) lilil film through said openings of the film gate,

a partition'in the casing forming a chamher in one portion of the casing, operating mechanism in said chamber of thecasing connected to the shutter for actuating the same, and intermittent mechanism interposed between the film feeding means and the o crating mechanism for actuating the film in timed relation. to the operation of the shutter.

5. In a stereoscopic motion picture camera,

a casing, a film gate in the casing havin a pair .of spaced openings therein, a pair 0 stere- 4 oscopic lenses in the casing in registry with said openings, means for advancing a film through the film gate intermittently and to expose-separate portions of the film but once at the openings, and a shutter operatively arranged in the casing between the lenses and the. filmgate, said shutter having a pair of openings therein for simultaneously registering with said openings to efl'ect'simultanspaced substantially a binocular apart for slidably receiving a film strip,-

during each period of rest of the film.

' 6. A camera for taking stereoscopic pairs of pictures upon standard size film comprising a casing, a film gate having 0 enin'gs istance lenses placed before said openings, a shutter in front of said openings with its axis of ro- "tation oflset from the line connecting the two lenses, a shaft likewise off said line connected to rotate said shutter and gear means to rotate said shaft, a Geneva motion also driven by'saidgear means, a shaft-separate GHARLEs-EBOUIN.

eous right and left stereoscopic-exposures- 

